56 lines
2.8 KiB
C
56 lines
2.8 KiB
C
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#ifdef __cplusplus
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extern "C" {
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#endif
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//===============================================================================================================================================================================================================200
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// DESCRIPTION
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//===============================================================================================================================================================================================================200
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// Returns: 0 if string does not represent integer
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// 1 if string represents integer
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//===============================================================================================================================================================================================================200
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// NUM CODE
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//===============================================================================================================================================================================================================200
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//======================================================================================================================================================150
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// ISINTEGER FUNCTION
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//======================================================================================================================================================150
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int isInteger(char *str) {
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//====================================================================================================100
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// make sure it's not empty
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//====================================================================================================100
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if (*str == '\0') {
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return 0;
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}
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//====================================================================================================100
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// if any digit is not a number, return false
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//====================================================================================================100
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for (; *str != '\0'; str++) {
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if (*str < 48 ||
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*str >
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57) { // digit characters (need to include . if checking for float)
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return 0;
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}
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}
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//====================================================================================================100
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// it got past all my checks so I think it's a number
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//====================================================================================================100
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return 1;
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}
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//===============================================================================================================================================================================================================200
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// END NUM CODE
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//===============================================================================================================================================================================================================200
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#ifdef __cplusplus
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}
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#endif
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