cif-else只回傳第一條陳述句

正如標題所說，它只輸出第一個 if 陳述句。我曾嘗試制作包含格式generalAverage < 97 && generalAverage >94并添加.00條件，但沒有任何效果。

#include<stdio.h>

char remarks[7][20] = {"Excellent", "Very Good", "Good", "Satisfactory", "Fair", "Passed", "Failed"}, opt;
float prelim, midterm, final, generalAverage, equivalent;

int main(){
    do {
        printf("STUDENT GRADE CALCULATOR\n");
        printf("      Enter the Prelim Grade        :   ");
        scanf(" %f", &prelim);
        printf("      Enter the Midterm Grade       :   ");
        scanf(" %f", &midterm);
        printf("      Enter the Final Grade     :   ");
        scanf(" %f", &final);
        printf("\n");
        
        generalAverage = (prelim   midterm   final) / 3;
        
        if (generalAverage > 96) {
            printf("     The General Average is     :   %.2f\n", generalAverage);
            printf("     Equivalent             :   1.0\n");
            printf("     Remarks                :   %s\n", remarks[0]);
        }
        else if (generalAverage < 97) {
            printf("     The General Average is     :   %.2f\n", generalAverage);
            printf("     Equivalent             :   1.25\n");
            printf("     Remarks                :   %s\n", remarks[0]);
        }
        else if (generalAverage < 94) {
            printf("     The General Average is     :   %.2f\n", generalAverage);
            printf("     Equivalent             :   1.50\n");
            printf("     Remarks                :   %s\n", remarks[1]);
        }
        else if (generalAverage < 89) {
            printf("     The General Average is     :   %.2f\n", generalAverage);
            printf("     Equivalent             :   1.75\n");
            printf("     Remarks                :   %s\n", remarks[1]);
        }
        else if (generalAverage < 88) {
            printf("     The General Average is     :   %.2f\n", generalAverage);
            printf("     Equivalent             :   2.00\n");
            printf("     Remarks                :   %s\n", remarks[2]);
        }
        else if (generalAverage < 85) {
            printf("     The General Average is     :   %.2f\n", generalAverage);
            printf("     Equivalent             :   2.25\n");
            printf("     Remarks                :   %s\n", remarks[2]);
        }
        else if (generalAverage < 82) {
            printf("     The General Average is     :   %.2f\n", generalAverage);
            printf("     Equivalent             :   2.50\n");
            printf("     Remarks                :   %s\n", remarks[3]);
        }
        else if (generalAverage < 77) {
            printf("     The General Average is     :   %.2f\n", generalAverage);
            printf("     Equivalent             :   2.75\n");
            printf("     Remarks                :   %s\n", remarks[4]);
        }
        else if (generalAverage == 75) {
            printf("     The General Average is     :   %.2f\n", generalAverage);
            printf("     Equivalent             :   3.00\n");
            printf("     Remarks                :   %s\n", remarks[5]);
        }
        else if (generalAverage < 75) {
            printf("     The General Average is     :   %.2f\n", generalAverage);
            printf("     Equivalent             :   5.00\n");
            printf("     Remarks                :   %s\n", remarks[6]);
        }
        
        printf("\n");
        printf("Do you want to continue (Type y or n):  ");
        scanf(" %c", &opt);
    }while(opt == 'Y'||opt == 'y');
} 

uj5u.com熱心網友回復：

你應該檢查從“緊”，通過“更慷慨”到“其他”。

if (generalAverage < 75) {
}
else if  (generalAverage == 75) {
}
else if (generalAverage < 77) {
}
else if (generalAverage < 82) {
}
else if (generalAverage < 85) {
}
else if (generalAverage < 88) {
}
else if (generalAverage < 89) {
}
else if (generalAverage < 94) {
}
else if (generalAverage < 97) {
} else                        {
}

如果您從（或早期擁有）慷慨的支票開始，例如

if (generalAverage < 97)

由于（否則是明智的）if-else 鏈，所有其余部分都將被忽略。

我認為您在 96.0 和 97.0 之間的值的值映射中也有意外重疊。這兩個條件<97又>96表現出“整數思維”。generalAverage 然而是浮動的，例如 96.5 匹配這兩個條件。由于奇怪的浮點數，finalelse而不是 an甚至比andelse if更巧妙地解決了問題。 比較浮點數學是否損壞？ 如果您觀察到即使您認為的值需要該分支，也沒有被使用，那么“損壞的浮動”鏈接也應該解釋這一點。<97>=97

==75

uj5u.com熱心網友回復：

第一個 if{} 和第二個 else if{ }block 考慮所有情況。

uj5u.com熱心網友回復：

如果順序錯誤，您的 else 。

如果 generalAverage 為 80，則如果它 < 97，它將始終進入第一個 else。

只需從最小的開始，然后逐步向上。

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